investigating limit(abs(x),x,0) bug



Paul Wang is pwang@cs.kent.edu

 http://monkey.cs.kent.edu/~pwang/ 

You could ask him .


Andrei Zorine wrote:

> After changing the mabs-subst function I get limit(abs(x),x,0) = 0 and 
> no tests break. I replaced
> (COND ((ZEROP1 D)  (SETQ D (BEHAVIOR A VAR VAL))
>                    (if (ZEROP1 D) (THROW 'MABS 'RETN))))
> with
> (if (AND (ZEROP1 D) (ZEROP1 (BEHAVIOR A VAR VAL)))
>         (SETQ EXP (MAXIMA-SUBSTITUTE A `((MABS) ,ANS) EXP)))
> I still don't understand what this BEHAVIOR function does. The MAXIMA 
> documentation says that the algorithm described in Wangs's Ph.D 
> thesis. My quesion is, is the thesis available online somethere? I 
> don't think I can find it in the nearest library here in Russia.
> --